This is it folks! Heaps of advancements in fabric, insulation, and design add up to the most evolved sleeping system on Earth. Incredibly lightweight Pertex fabric forms a water-resistant, breathable barrier against the elements. 900+ fill-power goose down is hand stuffed in Santa Rosa, California using Flow Gate Construction, which allows insulation to be shifted where it's needed most, anytime. Yeah, wow.

Features

Certified 875+ Fill Power Goose Down

Down Defender to Improve Water-Resistance in Wet Conditions

EN Tested

Insotect Flow Vertical Baffle System Reduces Weight and Transfers Heat from the Core of Your Body to Your Extremities

The Marmot Plasma 30 is the fluffiest, loftiest, most spectacular down sleeping bag I have ever climbed into. Ever. And I own three other 800+ fill down sleeping bags!

First of all, the 900-fill goose down is preposterously warm and light. The warmth-to-weight ratio here is absolutely as good as it gets. Beyond the down insulation, though, the Pertex Quantum shell has a great feel and doesn't seem like it has to be handled carefully... in contrast to other ultralight down sleeping bags on the market. The fabric has sort of a micro-ripstop to it, and it doesn't leak down like some of my other down bags do! Frankly, the shell material is above and beyond my expectations, and what sold me on this bag specifically.

In addition to its seriously light weight, Marmot has really done a great job maximizing thermal efficiency here. The face collar and down-filled hood trap heat perfectly, and comfortably. The neck draft collar is big and fluffy, and the draft tube is both huge and effective. The zipper is a YKK and rolls smoothly, with a well-designed anti-snag strip on the inside to help from snagging the draft tube. You do have to be careful not to catch the outer shell when zipping quickly, but at least the material is tough enough to handle it!

All in all, this thing is a dream to sleep in, and the Backpacker Magazine "editor's choice" award and Outside Magazine "gear of the year" award it earned in 2011 both agree with me. At 1 lb 8 oz, you're not going to find a better, lighter bag that will legitimately keep you warm when the night-time temperatures reach that magical +32F threshold!

I wish it came with a compression stuff sack instead of a regular one, but you'll be surprised how small this thing packs anyway. Seriously, five stars out of five. I'd give it six stars if that were possible. The Marmot Plasma sleeping bag is the best bag out there right now, and it's worth the price of admission.

I would have given this 5 stars but there is always room for improvement. The zipper has stuck on a few occasions and I feared I might actually damaged the material but thus far have not.Marmot continues to innovate even though they've had many bags in their line-up for years (now classics). The weight savings is minor over a very capable Marmot Hydrogen 30 for less money. The materials and the fact it's 900 fill justifies the difference in price for the Plasma 30. My get the Plasma 15 but I'm happy with my Helium for the time being.